<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<style>
button { width:50px; cursor:pointer; margin:5px; }
img { width:40px; }
</style>
</head>
<body>
<div style="text-align:center;">
<button id="button_window">页面</button>
<button id="button_video">视频</button>
</div>
<script src="popup.js"></script>
</body>
</html>
